Datagridview更改非空单元格的单元格颜色

Question

Im creating a calendar appointment application, Id like to change the color of the datagridview of the non empty cell (those with value) upon loading/opening the application. my application already handles how to load the data. i'm able to change the color of the non empty cell but after closing and opening again the color is back to default.

Im not sure with the correct syntax , or if i need to go through all the cells like do a loop for the entire table and change the cell back color.

VB.net 2012

so my questions is like or the loop i wanted to attain is ;

if the cell is not empty then change cell.color thanks for any help.

Answer 1

I manage to solve it:

Dim dgv As DataGridView = Me.TblCalendarDataGridView

    For i As Integer = 0 To dgv.Rows.Count - 1
        For ColNo As Integer = 4 To 7
            If Not dgv.Rows(i).Cells(ColNo).Value Is DBNull.Value Then

                dgv.Rows(i).Cells(ColNo).Style.BackColor =  vbcolor.blue
            End If
        Next
    Next

Answer 2

   'try this.........
   For i As Integer = 0 To DtGrd.Rows.Count - 1
        For ColNo As Integer = 4 To 7
            If Not DtGrd.Rows(i).Cells(ColNo).Value Is DBNull.Value Then

                DtGrd.Rows(i).Cells(ColNo).Style.BackColor = Color.Red
            End If
        Next
    Next